// Copyright 2021 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package google.cloud.automl.v1;

import "google/cloud/automl/v1/geometry.proto";
import "google/cloud/automl/v1/io.proto";
import "google/cloud/automl/v1/text_segment.proto";

option csharp_namespace = "Google.Cloud.AutoML.V1";
option go_package = "google.golang.org/genproto/googleapis/cloud/automl/v1;automl";
option java_multiple_files = true;
option java_package = "com.google.cloud.automl.v1";
option php_namespace = "Google\\Cloud\\AutoMl\\V1";
option ruby_package = "Google::Cloud::AutoML::V1";

// A representation of an image.
// Only images up to 30MB in size are supported.
message Image {
  // Input only. The data representing the image.
  // For Predict calls [image_bytes][google.cloud.automl.v1.Image.image_bytes] must be set .
  oneof data {
    // Image content represented as a stream of bytes.
    // Note: As with all `bytes` fields, protobuffers use a pure binary
    // representation, whereas JSON representations use base64.
    bytes image_bytes = 1;
  }

  // Output only. HTTP URI to the thumbnail image.
  string thumbnail_uri = 4;
}

// A representation of a text snippet.
message TextSnippet {
  // Required. The content of the text snippet as a string. Up to 250000
  // characters long.
  string content = 1;

  // Optional. The format of [content][google.cloud.automl.v1.TextSnippet.content]. Currently the only two allowed
  // values are "text/html" and "text/plain". If left blank, the format is
  // automatically determined from the type of the uploaded [content][google.cloud.automl.v1.TextSnippet.content].
  string mime_type = 2;

  // Output only. HTTP URI where you can download the content.
  string content_uri = 4;
}

// Message that describes dimension of a document.
message DocumentDimensions {
  // Unit of the document dimension.
  enum DocumentDimensionUnit {
    // Should not be used.
    DOCUMENT_DIMENSION_UNIT_UNSPECIFIED = 0;

    // Document dimension is measured in inches.
    INCH = 1;

    // Document dimension is measured in centimeters.
    CENTIMETER = 2;

    // Document dimension is measured in points. 72 points = 1 inch.
    POINT = 3;
  }

  // Unit of the dimension.
  DocumentDimensionUnit unit = 1;

  // Width value of the document, works together with the unit.
  float width = 2;

  // Height value of the document, works together with the unit.
  float height = 3;
}

// A structured text document e.g. a PDF.
message Document {
  // Describes the layout information of a [text_segment][google.cloud.automl.v1.Document.Layout.text_segment] in the document.
  message Layout {
    // The type of TextSegment in the context of the original document.
    enum TextSegmentType {
      // Should not be used.
      TEXT_SEGMENT_TYPE_UNSPECIFIED = 0;

      // The text segment is a token. e.g. word.
      TOKEN = 1;

      // The text segment is a paragraph.
      PARAGRAPH = 2;

      // The text segment is a form field.
      FORM_FIELD = 3;

      // The text segment is the name part of a form field. It will be treated
      // as child of another FORM_FIELD TextSegment if its span is subspan of
      // another TextSegment with type FORM_FIELD.
      FORM_FIELD_NAME = 4;

      // The text segment is the text content part of a form field. It will be
      // treated as child of another FORM_FIELD TextSegment if its span is
      // subspan of another TextSegment with type FORM_FIELD.
      FORM_FIELD_CONTENTS = 5;

      // The text segment is a whole table, including headers, and all rows.
      TABLE = 6;

      // The text segment is a table's headers. It will be treated as child of
      // another TABLE TextSegment if its span is subspan of another TextSegment
      // with type TABLE.
      TABLE_HEADER = 7;

      // The text segment is a row in table. It will be treated as child of
      // another TABLE TextSegment if its span is subspan of another TextSegment
      // with type TABLE.
      TABLE_ROW = 8;

      // The text segment is a cell in table. It will be treated as child of
      // another TABLE_ROW TextSegment if its span is subspan of another
      // TextSegment with type TABLE_ROW.
      TABLE_CELL = 9;
    }

    // Text Segment that represents a segment in
    // [document_text][google.cloud.automl.v1p1beta.Document.document_text].
    TextSegment text_segment = 1;

    // Page number of the [text_segment][google.cloud.automl.v1.Document.Layout.text_segment] in the original document, starts
    // from 1.
    int32 page_number = 2;

    // The position of the [text_segment][google.cloud.automl.v1.Document.Layout.text_segment] in the page.
    // Contains exactly 4
    // [normalized_vertices][google.cloud.automl.v1p1beta.BoundingPoly.normalized_vertices]
    // and they are connected by edges in the order provided, which will
    // represent a rectangle parallel to the frame. The
    // [NormalizedVertex-s][google.cloud.automl.v1p1beta.NormalizedVertex] are
    // relative to the page.
    // Coordinates are based on top-left as point (0,0).
    BoundingPoly bounding_poly = 3;

    // The type of the [text_segment][google.cloud.automl.v1.Document.Layout.text_segment] in document.
    TextSegmentType text_segment_type = 4;
  }

  // An input config specifying the content of the document.
  DocumentInputConfig input_config = 1;

  // The plain text version of this document.
  TextSnippet document_text = 2;

  // Describes the layout of the document.
  // Sorted by [page_number][].
  repeated Layout layout = 3;

  // The dimensions of the page in the document.
  DocumentDimensions document_dimensions = 4;

  // Number of pages in the document.
  int32 page_count = 5;
}

// Example data used for training or prediction.
message ExamplePayload {
  // Required. The example data.
  oneof payload {
    // Example image.
    Image image = 1;

    // Example text.
    TextSnippet text_snippet = 2;

    // Example document.
    Document document = 4;
  }
}